Improvement in the manufacture of sheet and bar iron



' UNITED STATES PATENT OFFICE.

JONATHAN M. JONES, OF EAST TAUNTON, MASSACHUSETTS, BARNERD SPAULDING, OF PORT RICHMOND, NEW YORK, AND SYLVESTER PARKINS, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN THE MANUFACTURE OF SHEET AND BAR IRON.

Specification forming part of Letters Patent No. 56,759, dated July 31, 1866.

To all whom it may concerw Be it known that we, JONATHAN JONES, of East Taunton, in the county of Bristol and State of Massachusetts, BARNERD SPAULD- ING, of Port Richmond, in the county of Richmond and State of New York, and SYLVES- TER PARK-INS, of Providence, in the county of Providence and State of Rhode Island,

have invented a new and useful Improvement in the Manufacture of Iron and we dohereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to fully understand and make use of the same.

Our invention has for its object to furnish sheet and bar iron tougher, more flexible. not so liable to rust, and which, when rolled into sheets, will make and take a finer polish than the ordinary iron, and be equal or superior to the best imported iron in all the qualities that make iron valuable; and it consists of the process for the manufacture of iron hereinafter described.

In manufacturing iron according to our improved process we take common wrought-iron, in scrap or bar, and cut it up into pieces of convenient size for packing the crucible. We then pack the crucible with the iron, putting into the bottom of the said crucible the following ingredients, in the following proportions, namely: two ounces of nitrate of lead, four ounces of muriate of antimony, live ounces of bone-dust, and six ounces of plumbago to every fifty-three pounds of iron. The

crucible is then placed in the furnace and the iron is melted. The crucible is then uncovcred while still in the furnace and its contents .stirred. It is then recovered and left in the furnace about ten minutes, and then uncovered and stirred again, and so on till it has been stirred four times. By this time all the impurities in the iron have risen to the top of the crucible, which is then removed from the furnace and the impurities skimmed off. care being used not to let the rod by means of which the flux is removed touch the metal. Themelted metal isthen poured into a castiron mold. For sheets this mold should be flat, and for bars square or round. When cold it is removed from the mold. reheated, and rolled in the ordinary manner.

What we claim as new, and desire to secure by Letters Patent, is

The improved process for the manufacture of iron, substantially as herein described, and for the purposes set forth.

The above specification of our invention signed by us this 11th and 14th days of J une, 

